diff --git a/tests/testthat/test_deps.R b/tests/testthat/test_deps.R
index e717575..328bf6d 100644
--- a/tests/testthat/test_deps.R
+++ b/tests/testthat/test_deps.R
@@ -50,6 +50,7 @@ test_that("d3_dep_v5 on latest d3 release", {
 test_that("d3-jetpack on latest release", {
   skip_on_cran()
   skip_on_travis()
+  skip_if_not_installed("github")
 
   expect_identical(
     jetpack$version,
diff --git a/tests/testthat/test_v8.R b/tests/testthat/test_v8.R
index f5bf78f..1396863 100644
--- a/tests/testthat/test_v8.R
+++ b/tests/testthat/test_v8.R
@@ -1,7 +1,7 @@
 context("V8context")
 
 test_that("d3_v8 has d3", {
-
+  skip_if_not_installed("V8")
   skip_on_cran()
   skip_on_travis()